diff options
Diffstat (limited to 'elf')
| -rw-r--r-- | elf/Makefile | 3 | ||||
| -rw-r--r-- | elf/dl-exception.c | 40 | ||||
| -rw-r--r-- | elf/tst-create_format1.c | 103 |
3 files changed, 145 insertions, 1 deletions
diff --git a/elf/Makefile b/elf/Makefile index d72e7b67f6..71f5896a6d 100644 --- a/elf/Makefile +++ b/elf/Makefile @@ -192,7 +192,8 @@ tests += restest1 preloadtest loadfail multiload origtest resolvfail \ tests-internal += loadtest unload unload2 circleload1 \ neededtest neededtest2 neededtest3 neededtest4 \ tst-tls3 tst-tls6 tst-tls7 tst-tls8 tst-dlmopen2 \ - tst-ptrguard1 tst-stackguard1 tst-libc_dlvsym + tst-ptrguard1 tst-stackguard1 tst-libc_dlvsym \ + tst-create_format1 ifeq ($(build-hardcoded-path-in-tests),yes) tests += tst-dlopen-aout tst-dlopen-aout-no-pie = yes diff --git a/elf/dl-exception.c b/elf/dl-exception.c index 1c63e4a3a6..1e41d89a7d 100644 --- a/elf/dl-exception.c +++ b/elf/dl-exception.c @@ -111,6 +111,20 @@ _dl_exception_create_format (struct dl_exception *exception, const char *objname case 's': length += strlen (va_arg (ap, const char *)); break; + /* Recognize the l modifier. It is only important on some + platforms where long and int have a different size. We + can use the same code for size_t. */ + case 'l': + case 'z': + if (p[1] == 'x') + { + length += LONG_WIDTH / 4; + ++p; + break; + } + case 'x': + length += INT_WIDTH / 4; + break; default: /* Assumed to be '%'. */ ++length; @@ -167,6 +181,32 @@ _dl_exception_create_format (struct dl_exception *exception, const char *objname *wptr = '%'; ++wptr; break; + case 'x': + { + unsigned long int num = va_arg (ap, unsigned int); + char *start = wptr; + wptr += INT_WIDTH / 4; + char *cp = _itoa (num, wptr, 16, 0); + /* Pad to the full width with 0. */ + while (cp != start) + *--cp = '0'; + } + break; + case 'l': + case 'z': + if (p[1] == 'x') + { + unsigned long int num = va_arg (ap, unsigned long int); + char *start = wptr; + wptr += LONG_WIDTH / 4; + char *cp = _itoa (num, wptr, 16, 0); + /* Pad to the full width with 0. */ + while (cp != start) + *--cp = '0'; + ++p; + break; + } + /* FALLTHROUGH */ default: _dl_fatal_printf ("Fatal error:" " invalid format in exception string\n"); diff --git a/elf/tst-create_format1.c b/elf/tst-create_format1.c new file mode 100644 index 0000000000..8b9edfdc69 --- /dev/null +++ b/elf/tst-create_format1.c @@ -0,0 +1,103 @@ +/* Check _dl_exception_create_format. + Copyright (C) 2018 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <ldsodefs.h> +#include <array_length.h> + +#include <support/check.h> +#include <support/xunistd.h> +#include <support/capture_subprocess.h> + +#define TEST(es, objn, fmt, ...) \ + ({ \ + struct dl_exception exception; \ + _dl_exception_create_format (&exception, objn, fmt, __VA_ARGS__); \ + TEST_COMPARE_STRING (exception.objname, objn == NULL ? "" : objn); \ + TEST_COMPARE_STRING (exception.errstring, es); \ + _dl_exception_free (&exception); \ + }) + +static void +do_test_invalid_conversion (void *closure) +{ + TEST ("(null)", NULL, "%p", NULL); +} + +/* Exit status after abnormal termination. */ +static int invalid_status; + +static void +init_invalid_status (void) +{ + pid_t pid = xfork (); + if (pid == 0) + _exit (127); + xwaitpid (pid, &invalid_status, 0); + if (WIFEXITED (invalid_status)) + invalid_status = WEXITSTATUS (invalid_status); +} + +static int +do_test (void) +{ + init_invalid_status (); + + TEST ("test", NULL, "%s", "test"); + TEST ("test-test", NULL, "%s-test", "test"); + TEST ("test", "test", "%s", "test"); + TEST ("test-test", "test", "%s-test", "test"); + + TEST ("test%", NULL, "%s%%", "test"); + TEST ("test%-test", NULL, "%s%%-test", "test"); + TEST ("test%", "test", "%s%%", "test"); + TEST ("test%-test", "test", "%s%%-test", "test"); + + TEST ("0000007b", NULL, "%x", 123); + TEST ("0000007b-test", NULL, "%x-test", 123); + TEST ("0000007b", "test", "%x", 123); + TEST ("0000007b-test", "test", "%x-test", 123); + +#define TEST_LONG(es, objn, fmt, ...) \ + ({ \ + if (sizeof (int) == sizeof (long int)) \ + TEST (es, objn, fmt, __VA_ARGS__); \ + else \ + TEST ("ffffffff" es, objn, fmt, __VA_ARGS__); \ + }) + + TEST_LONG ("fffffffd", NULL, "%lx", (long int)~2ul); + TEST_LONG ("fffffffd-test", NULL, "%lx-test", (long int)~2ul); + TEST_LONG ("fffffffd", "test", "%lx", (long int)~2ul); + TEST_LONG ("fffffffd-test", "test", "%lx-test", (long int)~2ul); + + TEST_LONG ("fffffffe", NULL, "%zx", (size_t)~1ul); + TEST_LONG ("fffffffe-test", NULL, "%zx-test", (size_t)~1ul); + TEST_LONG ("fffffffe", "test", "%zx", (size_t)~1ul); + TEST_LONG ("fffffffe-test", "test", "%zx-test", (size_t)~1ul); + + struct support_capture_subprocess result; + result = support_capture_subprocess (do_test_invalid_conversion, NULL); + support_capture_subprocess_check (&result, "dl-exception", + invalid_status, sc_allow_stderr); + TEST_COMPARE_STRING (result.err.buffer, + "Fatal error: invalid format in exception string\n"); + + return 0; +} + +#include <support/test-driver.c> |